I've noticed that when you select List Resources on a node in Manage Nodes that the interfaces are not listed in alphabetical or numerical order. They are listed in whatever order the modules were added in. So for example if you have a 4506 switch with modules 2, 4 & 5 already in NPM, when you add in a module into slot 3, List Resources now shows it at the bottom of the list.
Same problem goes for when you expand out a node in Manage Nodes so you can see the interfaces. These are listed in the order they were added in which makes it hard to see quickly if an interface is in fact already being managed.
It would be good if these were always listed in alphabetical or numerical order, rather than in the order they were added in.